Merge tag 'tegra-for-5.14-arm64-dt-fixes' of git://git.kernel.org/pub/scm/linux/kerne...

[linux-2.6-microblaze.git] / mm / mprotect.c

diff --git a/mm/mprotect.c b/mm/mprotect.c
index ee59618..883e2cc 100644 (file)
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -165,6 +165,14 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
                                newpte = swp_entry_to_pte(entry);
                                if (pte_swp_uffd_wp(oldpte))
                                        newpte = pte_swp_mkuffd_wp(newpte);
+                       } else if (is_writable_device_exclusive_entry(entry)) {
+                               entry = make_readable_device_exclusive_entry(
+                                                       swp_offset(entry));
+                               newpte = swp_entry_to_pte(entry);
+                               if (pte_swp_soft_dirty(oldpte))
+                                       newpte = pte_swp_mksoft_dirty(newpte);
+                               if (pte_swp_uffd_wp(oldpte))
+                                       newpte = pte_swp_mkuffd_wp(newpte);
                        } else {
                                newpte = oldpte;
                        }